Whodunnit? "killed off" two of its 13 guests during Sunday night's premiere of the new reality mystery competition's first episode.

Sheri, a 28-year-old ex-NFL cheerleader from Los Angeles, CA, was the first guest in the mansion to be "killed" at the beginning of last night's broadcast as a punishment for accidentally breaking her champagne glass, while Dontae, a 27-year-old insurance investigator from Long Beach, CA, was "killed" at the end of the episode for failing to solve the day's murder crime based upon the evidence supplied.

After each participant attempted to solve the crime of Sheri's "death," each guest received an envelope with a card inside telling them whether they were "spared" or "scared" -- meaning they'd be safe from elimination due to their successful crime-solving skills or potentially get "killed" for failing to impress the murderer with their statements of how they believed the incident's events unfolded.

Besides Dontae, fellow guest Don, a 62-year-old ex-homicide detective from Santa Clarita, CA, got the only other "scared" card but ended up surviving.

Whodunnit?'s first episode began with 13 strangers arriving at and moving into a mansion to play a mystery game in the hopes of winning the $250,000 reward.

In addition to Sheri, Dontae and Don, the guests were Adrianna, a 40-year-old TV crime reporter from Oklahoma City, OK; Cris, a 27-year-old ex-beauty queen from Costa Mesa, CA; Dana, a 39-year-old cardiac nurse from Asheville, NC; Geno, a 33-year-old bar trivia host from Chicago, IL; Kam, a 30-year-old homeland security attorney from New York, NY; Lindsey, a 27-year-old engineer from Boston, MA; Melina, a 29-year-old flight attendant from Chicago, IL; Ronnie, a 42-year-old bounty hunter from Kenilworth, NJ; Sasha, a 28-year-old journalist from Washington, DC; and Ulysses, a 30-year-old attorney from Mechanicsburg, PA.

After meeting the butler Giles and getting to know each other a little better, the guests ended up discovering a "dead body" lying on the floor and it was Sheri. She was surrounded by water, fish, blood, and a sparking loose wire. The group then learned one of them was actually the "killer" and it would be their job to figure out who that person was through a series of murders in which they'd be taken out one by one.

Sasha ended up impressing the "killer" most with her statement of how the murder occurred after gathering and interpreting all the evidence.

Sasha was closest to the story of what actually happened to Sheri, who was lured to a specific spot of the mansion, "killed" instantly with a slingshot to the back of the neck, and electrocuted by the wire once a fish tank broke and its contents spilled all over the floor around her.

In the middle of the night following the conclusion of Sheri's case, the fire alarm went off and everyone ran outside. At that moment, the guests realized Don was still with them and then they heard a scream and Dontae came running outside of the mansion with his entire body lit on fire. He fell into the pool and was clearly "dead."